<?php
/**
 * Zend Framework
 * LICENSE
 * This source file is subject to the new BSD license that is bundled
 * with this package in the file LICENSE.txt.
 * It is also available through the world-wide-web at this URL:
 * http://framework.zend.com/license/new-bsd
 * If you did not receive a copy of the license and are unable to
 * obtain it through the world-wide-web, please send an email
 * to license@zend.com so we can send you a copy immediately.
 * @category Zend
 * @package Zend_Session
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 * @version $Id: HttpUserAgent.php 24593 2012-01-05 20:35:02Z matthew $
 * @since Preview Release 0.2
 */
/**
 *
 * @see Zend_Session_Validator_Abstract
 */
require_once 'Zend/Session/Validator/Abstract.php';

/**
 * Zend_Session_Validator_HttpUserAgent
 * @category Zend
 * @package Zend_Session
 * @subpackage Validator
 * @copyright Copyright (c) 2005-2012 Zend Technologies USA Inc. (http://www.zend.com)
 * @license http://framework.zend.com/license/new-bsd New BSD License
 */
class Zend_Session_Validator_HttpUserAgent extends Zend_Session_Validator_Abstract {

    /**
     * Setup() - this method will get the current user agent and store it in the session
     * as 'valid data'
     * @return void
     */
    public function setup () {
        $this -> setValidData ((isset ($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null));
    }

    /**
     * Validate() - this method will determine if the current user agent matches the
     * user agent we stored when we initialized this variable.
     * @return bool
     */
    public function validate () {
        $currentBrowser = (isset ($_SERVER['HTTP_USER_AGENT']) ? $_SERVER['HTTP_USER_AGENT'] : null);
        return $currentBrowser === $this -> getValidData ();
    }

}
